Properties of amorphous hydrogenated silicon, with special emphasis on preparation by sputtering

1972, 8–10 and at Garmisch-Partenkirchen, 1973, eds. J. Stuke and W. Brenig (Taylor and Francis, London 1974). Adler, 1971, CRC Critical Rev. Solid State Sci., 2, 317, 10.1080/10408437108243545 1974 1973 Paul, 1972 Paul, 1973, Advan. Phys., 22, 529, 10.1080/00018737300101339 Lewis, 1974, 20, 27 Spear, 1973, 1 Sterling, 1965, Solid State Electron., 8, 653, 10.1016/0038-1101(65)90033-X Chittick, 1969, J. Electrochem. Soc., 116, 77, 10.1149/1.2411779 Brodsky, 1970, Phys. Rev., B1, 2632, 10.1103/PhysRevB.1.2632 Spear, 1975, Solid State Commun., 17, 1193, 10.1016/0038-1098(75)90284-7 Spear, 1976, Phil. Mag., 33, 935, 10.1080/14786437608221926 1977 1980, 35/36 1980, 2 1981 1981 1979, Vol. 36 Knights, 1980, CRC Critical Rev. Solid State Mater. Sci., 9, 10.1080/10408438008243572 Spear, 1977, Advan. Phys., 26, 811, 10.1080/00018737700101463 Fritzsche, 1978, Solid State Tech., 55 Carlson, 1980, Solar Energy Mater., 3, 503, 10.1016/0165-1633(80)90002-7 Paul, 1976, Solid State Commun., 20, 969, 10.1016/0038-1098(76)90485-3 Moustakas, 1977, Solid State Commun., 23, 155, 10.1016/0038-1098(77)90099-0 Anderson, 1977, 334 Moustakas, 1979, J. Electron. Mater., 8, 391, 10.1007/BF02655635 Thompson, 1978, Rev. de Phys. Appl., 13, 625, 10.1051/rphysap:019780013012062500 Austin, 1979, 43, 1155 Allison, 1980 Messier, 1980, Final Report to the D.O.E. on Contract No. DE-AC03-79ET23038 R. Ross and R. Messier, J. Appl. Phys., in press. McMillan, 1979, J. Appl. Phys., 50, 5238, 10.1063/1.326672 Jeffrey, 1979, J. Appl. Phys., 50, 7034, 10.1063/1.325862 Jeffrey, 1980, J. Non-Crystalline. Solids, 35/36, 261, 10.1016/0022-3093(80)90604-3 Brodsky, 1977, Phys. Rev., B16, 3556, 10.1103/PhysRevB.16.3556 Fang, 1980, J. Non-Crystalline. Solids, 35/36, 255, 10.1016/0022-3093(80)90603-1 de Neufville, 1980, J. Non-Crystalline. Solids, 35/36, 481, 10.1016/0022-3093(80)90641-9 Bruyère, 1980, J. Appl. Phys., 51, 2199, 10.1063/1.327895 Tanaka, 1980, J. Non-Crystalline. Solids, 35/36, 475, 10.1016/0022-3093(80)90640-7 Martin, 1981, J. Non-Crystalline. Solids, 45, 15, 10.1016/0022-3093(81)90085-5 Kramer, 1979, Vol. 36 Adler, 1981 review papers in ref. [7]; and J. D. Joannopoulos and D.C. Allan, to be published. LeComber, 1979, Vol. 36 D. A. Anderson and W. Paul, ref. [102]. Pawlewicz, 1978, J. Appl. Phys., 49, 5595, 10.1063/1.324481 Jeffrey, 1979, J. Appl. Phys., 50, 7034, 10.1063/1.325862 Jeffrey, 1980, J. Non-Crystalline. Solids, 35/36, 261, 10.1016/0022-3093(80)90604-3 See ref. [11]. See Messier and Tsong, ref. [11] Jones, 1967, J. Appl. Phys., 38, 4656, 10.1063/1.1709199 Thornton, 1977, Ann. Rev. Mater. Sci., 7, 239, 10.1146/annurev.ms.07.080177.001323 Thornton, 1974, J. Vac. Sci. Technol., 11, 666, 10.1116/1.1312732 See, however, discussion and references in Messier and Tsong, and in Ross and Messier, ref. [11]. Kampas, 1980, Solar Cells, 2, 385, 10.1016/0379-6787(80)90014-9 Kampas, 1981, 10 Paesler, 1980, J. Vac. Sci. and Technol., 17, 1332, 10.1116/1.570665 Matsuda, 1980, J. Non-Crystalline. Solids, 35/36, 183, 10.1016/0022-3093(80)90591-8 See Allison et al., ref. [11]. Turner, 1981, 47 Ross, 1981 Knights, 1980, Solar Cells, 2, 409, 10.1016/0379-6787(80)90017-4 Mosseri, 1980, J. Non-Crystalline. Solids, 35/36, 507, 10.1016/0022-3093(80)90645-6 Barna, 1977, Phys. Stat. Sol. (a), 41, 81, 10.1002/pssa.2210410107 Graczyk, 1979, Phys. Stat. Sol. (a), 55, 231, 10.1002/pssa.2210550126 Shevchik, 1972, J. Non-Crystalline. Solids, 8–10, 381, 10.1016/0022-3093(72)90164-0 Shevchik, 1974, J. Non-Crystalline. Solids, 13, 1, 10.1016/0022-3093(73)90032-X Shevchik, 1974, J. Non-Crystalline. Solids, 16, 55, 10.1016/0022-3093(74)90068-4 Paul, 1973, Advan. Phys., 22, 529, 10.1080/00018737300101339 Temkin, 1973, Advan. Phys., 22, 581, 10.1080/00018737300101349 Moss, 1969, Phys. Rev. Lett., 23, 1167, 10.1103/PhysRevLett.23.1167 Donovan, 1971, Phys. Rev. Lett., 27, 1794, 10.1103/PhysRevLett.27.1794 D'Antonio, 1979, Phys. Rev. Lett., 43, 1161, 10.1103/PhysRevLett.43.1161 D'Antonio, 1981, 117 Leadbetter, 1980, Solid State Commun., 33, 973, 10.1016/0038-1098(80)90293-8 Postol, 1980, Phys. Rev. Lett., 45, 648, 10.1103/PhysRevLett.45.648 Knights, 1979, Appl. Phys. Lett., 35, 244, 10.1063/1.91086 Knights, 1980, J. Non-Crystalline. Solids, 35/36, 159, 10.1016/0022-3093(80)90589-X Knights, 1979, Japan. J. Appl. Phys., 18, 101, 10.7567/JJAPS.18S1.101 J. C. Knights, R. A. Lujan, M. P. Rosenblum, R. A. Street, D. K. Biegelson and J. A. Reimer, to be published. Nemanich, 1980 Nemanich, 1980, J. Phys. Soc. Japan, 49, 1189 Reimer, 1980, Phys. Rev. Lett., 44, 193, 10.1103/PhysRevLett.44.193 Reimer, 1981, 78 Carlos, 1980, Phys. Rev. Lett., 45, 358, 10.1103/PhysRevLett.45.358 Carlos, 1981, 67 See the references to Messier and Tsong, and Ross and Messier, under ref. [11]. Anderson, 1979, J. Vac. Sci. Technol., 16, 906, 10.1116/1.570111 Fritzsche, 1979, Solar Energy Mater., 1, 471, 10.1016/0165-1633(79)90012-1 Freeman, 1980, Thesis E. C. Freeman and W. Paul, ref. [42]. F. Cocks, L. Dimmey, P. L. Jones and A. Korhonen, J. Appl. Phys. (in press). Freeman, 1978, Phys. Rev., B18, 4288, 10.1103/PhysRevB.18.4288 Freeman, 1979, Phys. Rev., B20, 716, 10.1103/PhysRevB.20.716 Anderson, 1980, J. Non-Crystalline. Solids, 35/36, 345, 10.1016/0022-3093(80)90618-3 Anderson, 1981, Phil. Mag. Moustakas, 1980, J. Non-Crystalline. Solids, 35/36, 719, 10.1016/0022-3093(80)90288-4 Bruyère, 1980, J. Appl. Phys., 51, 2199, 10.1063/1.327895 Deneuville, 1980, J. Non-Crystalline Solids, 35/36, 469, 10.1016/0022-3093(80)90639-0 Moustakas, 1977, Solid State Commun., 23, 155, 10.1016/0038-1098(77)90099-0 Ching, 1979, Phys. Rev. Lett., 42, 805, 10.1103/PhysRevLett.42.805 Fisch, 1978, Phys. Rev. Lett., 41, 889, 10.1103/PhysRevLett.41.889 Connell, 1976, Phys. Rev., B13, 787, 10.1103/PhysRevB.13.787 Brodsky, 1977, Phys. Rev., B16, 3556, 10.1103/PhysRevB.16.3556 Shanks, 1980, Phys. Stat. Sol. (b), 100, 43, 10.1002/pssb.2221000103 Brodsky, 1977, Phys. Rev., B16, 3556, 10.1103/PhysRevB.16.3556 Knights, 1978, Phil. Mag., B37, 467, 10.1080/01418637808225790 Lucovsky, 1979, B19, 2064 Knights, 1979, J. Non-Crystalline. Solids, 33, 373 Zanzucci, 1977, J. Appl. Phys., 48, 5227, 10.1063/1.323553 Lucovsky, 1981, Fundamental Physics of Amorphous Semiconductors, 87 Lucovsky, 1980, Solar Cells, 2, 431, 10.1016/0379-6787(80)90019-8 Oguz, 1980, Phys. Rev., B22, 880, 10.1103/PhysRevB.22.880 See, for example, refs. [41, 49, 51, 55, 58, 59]. Lucovsky, 1979, Solid State Commun., 29, 571, 10.1016/0038-1098(79)90666-5 Paul, 1980, Solid State Commun., 34, 283, 10.1016/0038-1098(80)90558-X Ref. [41]. Also unpublished material. Oguz, 1981 Private communication. Private communication. S. Oguz and B. Yacobi, private communication. Fritzsche, 1979, J. Appl. Phys., 50, 3366, 10.1063/1.326326 McMillan, 1979, J. Appl. Phys., 50, 5328, 10.1063/1.326672 Oguz, 1980, Phys. Rev., B22, 6213, 10.1103/PhysRevB.22.6213 Oguz, 1980, J. Non-Crystalline. Solids, 35/36, 231, 10.1016/0022-3093(80)90599-2 Biegelsen, 1979, Phys. Rev., B20, 4839, 10.1103/PhysRevB.20.4839 Brodsky, 1977, Appl. Phys. Lett., 30, 561, 10.1063/1.89260 Matysik, 1978, J. Vac. Sci. Technol., 15, 302, 10.1116/1.569575 Oguz, 1981 Biegelsen, 1980, J. Non-Crystalline. Solids, 35/36, 285, 10.1016/0022-3093(80)90608-0 Fang, 1980, J. Non-Crystalline. Solids, 35/36, 255, 10.1016/0022-3093(80)90603-1 Zellama, 1980, J. Non-Crystalline. Solids, 35/36, 225, 10.1016/0022-3093(80)90598-0 John, 1980, J. Non-Crystalline. Solids, 35/36, 237, 10.1016/0022-3093(80)90600-6 Bruyère, 1980, J. Appl. Phys., 51, 2199, 10.1063/1.327895 K. Zellama, P. Germain, S. Squelard, B. Bourdon, J. Fontenille and R. Danielou, Phys. Rev. (submitted). von Roedern, 1980, Phys. Rev. Lett., 39, 1576, 10.1103/PhysRevLett.39.1576 von Roedern, 1979, Phil. Mag., B40, 433, 10.1080/01418637908226768 von Roedern, 1980, Solid State Commun., 35, 467, 10.1016/0038-1098(80)90250-1 Ching, 1979, Phys. Rev. Lett., 42, 805, 10.1103/PhysRevLett.42.805 Joannopoulos, 1979, J. Non-Crystalline. Solids, 32, 241, 10.1016/0022-3093(79)90075-9 Allan, 1980, Phys. Rev. Lett., 44, 43, 10.1103/PhysRevLett.44.43 Ching, 1980, Phys. Rev., B21, 2378, 10.1103/PhysRevB.21.2378 Ley, 1981, 161 Jeffrey, 1981, 83 Lanford, 1980, Solar Cells, 2, 351, 10.1016/0379-6787(80)90011-3 Lanford, 1977, Appl. Phys. Lett., 30, 566 Milleville, 1979, Appl. Phys. Lett., 34, 173, 10.1063/1.90718 Magee, 1980, Solar Cells, 2, 365, 10.1016/0379-6787(80)90012-5 Clark, 1977, Appl. Phys. Lett., 31, 582, 10.1063/1.89787 Bruyère, 1980, J. Appl. Phys., 51, 2199, 10.1063/1.327895 S. Oguz, W. Paul and W. A. Lanford, unpublished collaboration. See ref. [83]. S. Oguz, unpublished Harvard results. Jones, 1979, Solar Energy Mater., 2, 93, 10.1016/0165-1633(79)90033-9 Tanaka, 1980, J. Non-Crystalline. Solids, 35/36, 475, 10.1016/0022-3093(80)90640-7 Paesler, 1978, Phys. Rev. Lett., 41, 1492, 10.1103/PhysRevLett.41.1492 B. G. Yacobi et al., to be published from the Harvard Laboratory. Knights, 1980, J. Non-Crystalline. Solids, 35/36, 279, 10.1016/0022-3093(80)90607-9 Griffith, 1980, J. Non-Crystalline. Solids, 35/36, 391, 10.1016/0022-3093(80)90626-2 P. E. Vanier, A. E. Delahoy and R. W. Griffith, submitted for publication. Griffith, 1980 Pawlik, 1979, Thesis J. R. Pawlik and W. Paul, ref. [111]. Anderson, 1977, 334 Moustakas, 1977, Solid State Commun., 23, 155, 10.1016/0038-1098(77)90099-0 T.D. Moustakas and W. Paul, unpublished Harvard results (1977) Paesler, 1980, Phil. Mag., B41, 393, 10.1080/13642818008245396 Anderson, 1979, Solid State Commun., 31, 677, 10.1016/0038-1098(79)90322-3 D.A. Anderson and W. Paul, Phil. Mag. (to be published). Anderson, 1980 Anderson, 1980, J. Phys. Soc. Japan, 49, 1197 Paul, 1973, Advan. Phys., 22, 529, 10.1080/00018737300101339 Paul, 1979 Phillips, 1979, Phys. Rev. Lett., 42, 1151, 10.1103/PhysRevLett.42.1151 Adler, 1978, Phys. Rev. Lett., 41, 1755, 10.1103/PhysRevLett.41.1755 Adler, 1980, J. Non-Crystalline. Solids, 35/36, 819, 10.1016/0022-3093(80)90301-4 Adler, 1980, Solar Cells, 2, 199, 10.1016/0379-6787(80)90027-7 Elliott, 1978, Phil. Mag., B38, 325, 10.1080/13642817808245334 Joannopoulos, 1980, J. Non-Crystalline. Solids, 35/36, 781, 10.1016/0022-3093(80)90298-7 Stuke, 1977, 406 Pawlik, 1977, 437 Title, 1977, 424 J. R. Pawlik and W. Paul, ref. [111]. Biegelsen, 1977, 429 Knights, 1977, Solid State Commun., 22, 133, 10.1016/0038-1098(77)90418-5 Friederich, 1978, J. Electron. Mater., 7, 253, 10.1007/BF02655677 Street, 1980, J. Non-Crystalline. Solids, 35/36, 651, 10.1016/0022-3093(80)90278-1 Biegelsen, 1978, Phil. Mag., B37, 477, 10.1080/01418637808225791 Morigaki, 1978, Solid State Commun., 26, 981, 10.1016/0038-1098(78)91267-X Morigaki, 1980, J. Non-Crystalline Solids, 35/36, 633, 10.1016/0022-3093(80)90275-6 Biegelsen, 1980, Solar Cells, 2, 421, 10.1016/0379-6787(80)90018-6 Brodsky, 1976, Structure and Excitations in Amorphous Solids, A.I.P. Vol. 31, 97 Voget-Grote, 1976, 31, 91 Street, 1978, Phys. Rev., B18, 1880, 10.1103/PhysRevB.18.1880 Fritzsche, 1978, Solid State Technol., 21, 55 Crandall, 1980, Solar Cells, 2, 319, 10.1016/0379-6787(80)90035-6 Crandall, 1980, Non-Crystalline Solids, 35/36, 381, 10.1016/0022-3093(80)90624-9 Wronski, 1980, Appl. Phys. Lett., 37, 96, 10.1063/1.91717 LeComber, 1973, 373 D. A. Anderson, G. Moddel, R. W. Collins and W. Paul, ref.[101]. D. A. Anderson, G. Moddel and W. Paul, ref. [43]. Pankove, 1980, J. Non-Crystalline Solids, 35/36, 459, 10.1016/0022-3093(80)90637-7 Moustakas, 1980, Solid State Commun., 35, 745, 10.1016/0038-1098(80)91067-4 Gody, 1980, Solar Cells, 2, 227, 10.1016/0379-6787(80)90028-9 Ref. [43], and T. D. Moustakas, ref. [119]. B. von Roedern and G. Moddel, ref. [78]. Harvard group results, to be published. Olivier, 1980, J. Phys. Soc. Japan, 49, 1201 Yamasaki, 1981, 258 Jackson, 1981, 263 Spear, 1972, J. Non-Crystalline Solids, 8–10, 727, 10.1016/0022-3093(72)90220-7 Spear, 1976, Phil. Mag., 33, 935, 10.1080/14786437608221926 Madam, 1976, 20, 239 Madan, 1977, 377 Goodman, 1980, J. Non-Crystalline Solids, 35/36, 599, 10.1016/0022-3093(80)90660-2 Goodman, 1980, Phil. Mag., B42, 149, 10.1080/01418638008225645 Powell, 1981, Phil. Mag., 43, 93, 10.1080/01418638108225803 Weisfield, 1981, Phil. Mag., B44, 83, 10.1080/01418638108222369 Grünewald, 1980, Phys. Stat. Sol. (b), 100, K139, 10.1002/pssb.2221000253 Hirose, 1979, Appl. Phys. Lett., 34, 234, 10.1063/1.90749 Spear, 1978, Phil. Mag., B38, 303, 10.1080/13642817808245332 1980 Weisfield, 1981, Appl. Phys. Lett., 39, 263, 10.1063/1.92666 Goodman, 1981, 176 Döhler, 1977, 372 Beichler, 1980, J. Non-Crystalline Solids, 35/36, 587, 10.1016/0022-3093(80)90658-4 Viktorovitch, 1979, Rev. Phys. Appl., 14, 201, 10.1051/rphysap:01979001401020100 Viktorovitch, 1980, J. Non-Crystalline Solids, 35/36, 569, 10.1016/0022-3093(80)90655-9 Viktorovitch, 1980, J. Appl. Phys., 51, 4847, 10.1063/1.328319 Tiedje, 1980, J. Non-Crystalline Solids, 35/36, 740, 10.1016/0022-3093(80)90292-6 Tiedje, 1980, Solar Cells, 2, 301, 10.1016/0379-6787(80)90034-4 Viktorovitch, 1981, J. Appl. Phys., 52, 1392, 10.1063/1.329771 Lang, 1974, J. Appl. Phys., 45, 3032 Cohen, 1980, Solar Cells, 2, 331, 10.1016/0379-6787(80)90036-8 Cohen, 1981, 217 Balberg, 1979, Phys. Rev. Lett., 43, 58, 10.1103/PhysRevLett.43.58 Balberg, 1980, Phys. Rev., B22, 3853, 10.1103/PhysRevB.22.3853 Rehm, 1977, Phys. Stat. Sol. (b), 79, 539, 10.1002/pssb.2220790218 Beyer, 1979, Phil. Mag., B49, 205, 10.1080/13642817908245357 Beyer, 1979, Solid State Commun., 31, 1, 10.1016/0038-1098(79)90521-0 Grünewald, 1979, Phys. Stat. Sol. (b), 94, 125, 10.1002/pssb.2220940113 Döhler, 1979, Phys. Rev., B19, 2083, 10.1103/PhysRevB.19.2083 Carlson, 1979, Vol. 36, 287 Spear, 1980, J. Non-Crystalline Solids, 35/36, 357, 10.1016/0022-3093(80)90620-1 D. A. Anderson and W. Paul, Phil. Mag. to be published. Tanielian, 1980, J. Non-Crystalline Solids, 35/36, 575, 10.1016/0022-3093(80)90656-0 Solomon, 1979, 689 Hindley, 1970, J. Non-Crystalline. Solids, 5, 17, 10.1016/0022-3093(70)90193-6 Pistoulet, 1978, J. Non-Crystalline. Solids, 29, 29, 10.1016/0022-3093(78)90137-0 LeComber, 1972, J. Non-Crystalline. Solids, 11, 219, 10.1016/0022-3093(72)90004-X Dresner, 1980, Appl. Phys. Lett., 37, 742, 10.1063/1.92017 Connell, 1979, Vol. 36, 73 Theye, 1976, 111 Cody, 1980, Solar Cells, 2, 227, 10.1016/0379-6787(80)90028-9 Pierce, 1972, Phys. Rev., B5, 3017, 10.1103/PhysRevB.5.3017 Philipp, 1963, Phys. Rev., 129, 1550, 10.1103/PhysRev.129.1550 Haller, 1978, 1147 Weiser, 1979, Phil. Mag., B40, 291 Weiser, 1980, J. Non-Crystalline Solids, 35/36, 447, 10.1016/0022-3093(80)90635-3 Janai, 1979, Solar Energy Mater., 1, 11, 10.1016/0165-1633(79)90053-4 Tauc, 1974 Wood, 1972, Phys. Rev., B5, 3144, 10.1103/PhysRevB.5.3144 Tauc, 1970, Mater. Res. Bull., 5, 721, 10.1016/0025-5408(70)90112-1 Dow, 1972, Phys. Rev., B5, 594, 10.1103/PhysRevB.5.594 Loveland, 1973, J. Non-Crystalline. Solids, 13, 55, 10.1016/0022-3093(73)90035-5 Zanzucchi, 1977, J. Appl. Phys., 48, 5227, 10.1063/1.323553 Knights, 1976, 31, 296 Pankove, 1980, J. Non-Crystalline. Solids, 35/36, 459, 10.1016/0022-3093(80)90637-7 Deneuville, 1980, J. Non-Crystalline. Solids, 35/36, 469, 10.1016/0022-3093(80)90639-0 de Neufville, 1980, J. Non-Crystalline Solids, 35/36, 481, 10.1016/0022-3093(80)90641-9 Abeles, 1980, Solid State Commun., 36, 537, 10.1016/0038-1098(80)90382-8 See Cody et al., ref. [156]. Knights, 1976, Structure and Excitations of Amorphous Solids, 296 Chevallier, 1977, Solid State Commun., 24, 867, 10.1016/0038-1098(77)91232-7 W. Paul, in: Fundamental Physics of Amorphous Semiconductors, ref. [7]. D. K. Paul et al., to be published. Anderson, 1977, Phil. Mag., 35, 1, 10.1080/14786437708235967 Shimada, 1979, J. Appl. Phys., 50, 5530, 10.1063/1.326614 Connell, 1974, High Temp.—High Pressures, 6, 85 Connell, 1972, J. Non-Crystalline Solids, 8–10, 215, 10.1016/0022-3093(72)90139-1 Welber, 1977, Phys. Rev., B16, 3660, 10.1103/PhysRevB.16.3660 Paul, 1955, Phys. Rev., 98, 1755, 10.1103/PhysRev.98.1755 R. W. Collins, data to be published. Austin, 1978, 115 Brodsky, 1977, 402 Fischer, 1979, Amorphous Semiconductors, Vol. 36 H. Fritzsche, ref. [8]. R. W. Collins, See B. G. Yacobi et al., ref. [94]. Street, 1978, Phil. Mag., B37, 35, 10.1080/13642817808245304 See M. A. Paesler and W. Paul, ref. [100]. See J. I. Pankove et al., ref. [165]. Engemann, 1974, 947 Engemann, 1977, Structure and Excitations of Amorphous Solids, 31, 37 Engemann, 1977, Phys. Stat. Sol. (b), 79, 195, 10.1002/pssb.2220790120 Nashashibi, 1980, J. Non-Crystalline. Solids, 35/36, 675, 10.1016/0022-3093(80)90282-3 Tsang, 1979, Phys. Rev., B19, 3027, 10.1103/PhysRevB.19.3027 Collins, 1980, Solid State Commun., 34, 833, 10.1016/0038-1098(80)91062-5 Higashi, 1979, J. Phys., C12, L821 Gee, 1979, Phys. Rev. Lett., 42, 1765, 10.1103/PhysRevLett.42.1765 Street, 1981, Phys. Rev., B23, 861, 10.1103/PhysRevB.23.861 Street, 1979, 43, 1139 Searle, 1979, Phil. Mag., 39, 389, 10.1080/13642817908245810 Kurita, 1979, Solid State Commun., 32, 879, 10.1016/0038-1098(79)90491-5 T. S. Nashashibi et al., ref. [179]. Collins, 1981 Street, 1980, Solid State Commun., 34, 157, 10.1016/0038-1098(80)91137-0 Collins, 1980, J. Non-Crystalline Solids, 35/36, 681, 10.1016/0022-3093(80)90283-5 Engemann, 1975, 217 Nashashibi, 1977, Phil. Mag., 35, 831, 10.1080/14786437708236013 Street, 1979, Phil. Mag., B40, 451, 10.1080/01418637908226769 Voget-Grote, 1980, Phil. Mag., B41, 127, 10.1080/13642818008245375 Spear, 1976, 216 Enck, 1976, 297 T. D. Moustakas, ref. [10]. Brodsky, 1980, Solar Cells, 2, 401, 10.1016/0379-6787(80)90015-0 Fritzsche, 1980, Solar Cells, 2, 289, 10.1016/0379-6787(80)90033-2 Staebler, 1977, Appl. Phys. Lett., 31, 292, 10.1063/1.89674 Staebler, 1980, J. Appl. Phys., 51, 3262, 10.1063/1.328084 Jousse, 1980, J. Non-Crystalline. Solids, 35/36, 767, 10.1016/0022-3093(80)90296-3 Moddel, 1981, 25 1980, Solar Cells, 2 See ref. [9]. See D. E. Carlson and C. R. Wronski, in: Amorphous Semiconductors, ref. [7]. G. Moddel, measurements to be published. Moustakas, 1976, Solid State Commun., 23, 155, 10.1016/0038-1098(77)90099-0 T. D. Moustakas, ref. [10]. Moustakas, 1980, Solid State Commun., 35, 745, 10.1016/0038-1098(80)91067-4 Spear, 1974, J. Non-Crystalline. Solids, 15, 410, 10.1016/0022-3093(74)90147-1 Anderson, 1977, Phil. Mag., 36, 695, 10.1080/14786437708239749 Rose, 1963 P. E. Vanier and R. W. Griffith, to be published. Part of an extensive program at Brookhaven also involving A. E. Delahoy. Persans, 1980, Solid State Commun., 36, 851, 10.1016/0038-1098(80)90127-1 P. D. Persans and H. Fritzsche, to be published. Ackley, 1979, Phys. Rev. Lett., 43, 715, 10.1103/PhysRevLett.43.715 Vardeny, 1981, 243 Johnson, 1980, 71 Johnson, 1980, 285 LeComber, 1972, J. Non-Crystalline Solids, 11, 219, 10.1016/0022-3093(72)90004-X Moore, 1977, Appl. Phys. Lett., 31, 762, 10.1063/1.89539 Allan, 1977, 323 Tiedje, 1980, Solar Cells, 2, 301, 10.1016/0379-6787(80)90034-4 Kirby, 1981, 207 Hvam, 1981, Phys. Rev. Lett., 46, 371, 10.1103/PhysRevLett.46.371 R. A. Street, to be published. P. B. Kirby and W. Paul, to be published. Z. Vardeny, J. Tauc and C. J. Fang, ref. [204]. Z. Vardeny and J. Tauc, preprint. Pfister, 1978, Advan. Phys., 27, 747, 10.1080/00018737800101474 Pollak, 1977, Phil. Mag., 36, 1157, 10.1080/14786437708239787 Marshall, 1977, Phil. Mag., 36, 959, 10.1080/14786437708239770 Noolandi, 1977, Phys. Rev., B16, 4466, 10.1103/PhysRevB.16.4466 Schmidlin, 1977, Phys. Rev., B16, 2362, 10.1103/PhysRevB.16.2362 Tiedje, 1980, Solid State Commun., 37, 49, 10.1016/0038-1098(81)90886-3 Tiedje, 1981, 197 J. Orenstein and M. Kastner, preprint. Silver, 1977, Phys. Rev., B15, 3276, 10.1103/PhysRevB.15.3276 1980, 35/36 Tiedje, 1980, Appl. Phys. Lett., 36, 695, 10.1063/1.91596 T. Tiedje, A Rose and J. M. Cebulka, ref. [212]. Kirby, 1981 P. B. Kirby and W. Paul, unpublished results. R. A. Street, preprint (1980). Hvam, 1981, Phys. Rev. Lett., 46, 371, 10.1103/PhysRevLett.46.371 Although this reviewe concentrates on a-Si:H, similar observations on chalcogenides need to be studied. See Orenstein and Kastner, ref. [213]. Wronski, 1980, Solar Cells, 2, 245, 10.1016/0379-6787(80)90029-0 Dresner, 1981, Appl. Phys. Lett., 38, 998, 10.1063/1.92226 Mort, 1980, Solar Cells, 2, 451, 10.1016/0379-6787(80)90021-6 Shimizu, 1980, J. Non-Crystalline. Solids, 35/36, 773, 10.1016/0022-3093(80)90297-5 W. Paul, Warsaw Conf. ref. [1].